@Codingale , I will need also the ModuleManager.log and the ConfigCache. I'm seeing you are using the /L Fork, nice to see I'm not the only crazy dude around! :)

[LOG 08:13:36.179] [ModuleManager] Version 4.2.2.5 /L

This makes things way easier. Just zip the <KSP_ROOT>/PluginData/ModuleManager folder with everything it have inside and drop the zip here on a comment.

On the bright side, MRS parching is being doing right:

So it's a 3rd party borking. Humm.. Let me check TS deprecated patches…. [edit] Nope, there's nothing on TS that could be causing that. It's really a 3rd party patch borking on us

[LOG 23:41:17.581] [TweakScale] ERROR: **FATAL** Part mrs-tank-250-cone (MRS Fuel Tank, Adapter 2.5m to 1.25m) has a fatal problem due having duplicated properties - see issue [#34]( https://github.com/net-lisias-ksp/TweakScale/issues/34 ). at error:0
[LOG 23:41:17.581] [TweakScale] ERROR: **FATAL** Part NBconeTank2m (Kindly use new part numbers MRS Fuel Tank, Adapter 2.5m to 1.25m) has a fatal problem due having duplicated properties - see issue [#34]( https://github.com/net-lisias-ksp/TweakScale/issues/34 ). at error:0

Adding onto this, it seems it wasn't completely resolved, or maybe something strange happened since I'm using the release 1.13.99.0

Adding onto this, it seems it wasn't completely resolved, or maybe something strange happened since I'm using the release 1.13.99.0

Thank you @Codingale

👀 investigating

@Lisias

Classical case of double patching. @Codingale , please upload your full KSP.log and I will give it a look.

Pardon the delay:
https://gist.github.com/Codingale/1d8e89f4dd7af9e393d277be8a70c37e

@Codingale - bug squashing continues. As soon as I know what the issue is, will publish a hotfix.

Pardon the delay: ModuleManager.zip
Anything else let me know.

I believe I know the fix; will be back after some sleep.

plan is to get this fixed and published in the next 36-48 hours.

@Codingale @Lisias
this should be the fix: TweakScale-v1.3.99.1.zip

kindly try out and tell me the results